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  1. H

    ACCT1501/ECON1101 Results Thread

    go back to usyd just kidding man
  2. H

    imports and exports

    Just imagine a world with you and 195 friends, each of you own a company which sells food If you (Australia) have a rise in income, then you will have more money to spare, so you would buy more food from your friends (overseas) (so increasing imports) If your friends (overseas) have a rise...
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    Simple harmonic Qs

    No! Acceleration is not proportional to displacement
  4. H

    UNSW Chit Chat Thread 2014

    I got 6 Times top and bottom by sqrt(9x^2+5) + 3(x-2), simplify and divide by every term by the lowest power of 'x' belonging in the denominator - in this case, x
  5. H

    How to solve x*e^2x=4

    loooooooooool
  6. H

    How to solve x*e^2x=4

    Not everyone remembers everything
  7. H

    UNSW Chit Chat Thread 2014

    ^Bold - sorry i had to do it, gave me a nice laugh lol yeh that's a nice strategy man, i also realised that i tend to over-think and make more errors when attempting a question twice lol - this happened to me in the recent calculus test :( yeh the logical step for breaking the absolute value...
  8. H

    UNSW Chit Chat Thread 2014

    You should be so careful if you are afraid of 'silly mistakes'. If you have defeated the 'silly mistakes' obstacle, then I think you should speed through the easy questions with maximum focus and then use most of your time on the harder questions or ones that require careful reasoning (mostly...
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    UNSW Chit Chat Thread 2014

    LOL yeh haha The limit questions (finding the left and right hand side of the limit) were so time consuming
  10. H

    UNSW Chit Chat Thread 2014

    lol... they are so hard dude, i cant even do half of it..
  11. H

    UNSW Chit Chat Thread 2014

    80% is a beautiful mark man, i think i would get >50% :D ah silly mistakes are not a problem for me anymore, my work is more organised..since im in 1141, there might be [X] questions!!!! im scared!!! (which past tests are you talking about...I haven't done any)
  12. H

    UNSW Chit Chat Thread 2014

    me :D who does MATH1081 (discrete maths) here? if you are, how are you finding it?
  13. H

    SA-help

    Thanks bro
  14. H

    SA-help

    Hello! So on myUNSW -> Commonwealth Gov Forms -> SA help -> SA-help applied for.... (this is what is says on mine) Does that mean im under SA-help? Thanks
  15. H

    MATH1081 Topic 1 Revision mega-thread

    Comp sci, software engo, adv math (one of them)
  16. H

    MATH1081 Topic 1 Revision mega-thread

    Drewk, read the question again Your (AUB^c)U(AUB) should be (A intersect B^c) U (A U B) AND say if you began from (AUB^c)U(AUB) - you can't use the distributive law
  17. H

    MATH1081 Topic 1 Revision mega-thread

    hm.... ii) f(g(x)) is an exponential function, so clearly for every y in R, there exists at most one x in R such that f(g(x)) = y (this is the idea in your mind) To show it in the test, just show that if x,y in R and f(x) = f(y), then x = y!! (this actually means that if you begin with x and y...
  18. H

    MATH1081 Topic 1 Revision mega-thread

    i) Yep correct, I think you should write 'one-to-one' instead of '1-1' EDIT: Also include that for x, y in A, if f(x) = f(y), then x = y and likewise for function g ii) Show a bit more working out Start from g(f(x)) = g(f(y)) f(x) = f(y) as g is one-to-one x = y as f is one-to-one hence g...
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    MATH1081 Topic 1 Revision mega-thread

    The function is f(x), so if you input blah, you get blah Input [0,1], you get [0,1], hence that is the range yep, continue with that working out or you will lose marks sorry, but i have to go now, i'll help you tomorrow - good luck with this
  20. H

    MATH1081 Topic 1 Revision mega-thread

    Range (f) = (-infinity, infinity) f is 1-1 iff for all y ∈ R, there exists AT MOST one x ∈ R such that f(x) = y So it's either yes or no. Clearly from a quick sketch, it is NOT 1-1, so we need to provide a counter-example (numerical example) So when y = -4, 2x^3 + 3x^2 = 0 --> gives 2 x...
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